<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">你好</div>

    <script type="x-template" id="template">
        <div>
            <h2>{{message}}</h2>
        </div>
    </script>

    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
    <script>
        // console.log(document.getElementById('template'));
        Vue.createApp({
            template:'#template',
            data:function(){
                return {
                    message:'Hello World'//这里的message是一个变量,整个页面都可以使用
                }
            }
        }).mount('#app')
    </script>
</body>
</html>